Concentrator.



PATENTED FEB. 11, 1908.

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c M. P. BOSS.

OONOENTRATOR APPLIOATION FILED MAY 21. 1906.

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1m: NORRIS PETERS C0,, WASHINGTON. o. c,

No. 878,861; PATENTED FEB. 11, 1908.

M. P. BOSS. CONCENTRATOR.

APPLICATION FILED MAY 21, 1906.

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No. 878,861. PATENT'ED FEB. 11, 1908 M. P. BOSS. OONGENTRATOR.APPLICATION FILED MAY 21, 1906.

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THE uonms PETE-S co, WASHINGTON, n. c.

MARTIN PRIOR Boss, or SAN FRANCISCO, CALIFORNIA.

CONCENTRATOR.

Specification of Letters Patent.

Patented Feb. 11, 1908.

Application filed May 21. 1906. Serial No- 317.936.

T '0 all whom it may concern:

Be it known that I, MARTIN P. Boss, citizen of United States, residingat the city and county of San Francisco and State of California, haveinvented new and useful Improvements in Concentrators, of which thefollowing is a specification.

My invention relates to an apparatus for concentrating ores and isparticularly designed to eliminate a clean gangue from a pulp, saving aproduct containing all the con centratable values not necessarily freedfrom gangue, but having greatly reduced volume for re-treatment in amore complete manner.

- It consists in the combination of mechanism and in details ofconstruction which will be more fully explained by reference to theaccompanying drawings, in which Figure 1 is a side elevation of myapparatus. Fig. 2 is a plan view. Fig. 3 is an end View. Fig. 4 is aplan of table. Fig. 5 is a longitudinal section. Fig. 6 is a sideelevation. Fig. 7 is a transverse section. Fig. 8. is an enlargedtransverse section of one of the grooves or channels, showing thedecreasing depth. Fig. 9 is a longitudinal section showing the mechanismfor reciprocating the table. Fig. 10 is a plan view of the same, andFig. 11 is a transverse section through the crank shaft. Fig. 12 is adiagrammatic view illustrating the movement which takes place. Fig. 13is a side view, and 14 is a plan of the bed and carriage. Figs. 15, 16and 17 are details of the differential rollers and connections.

As shown in the present illustration, the device consists of a bed, atraveling carriage, a top or table proper, and head mechanism forproducing a longitudinal reciprocation.

The bed A is firmly fixed or anchored by means of a transverse trunnion2 about which it is tiltable so that the level of the table may beadjusted longitudinally. The bed A may be tilted upon its trunnions bymeans of vertically movable adjusting screws 3, or by any equivalent orsuitable means. The carriage 3 is movable longitudinally upon the bedbeing supported by differential rollers 4 which are supported by andtravel in boxes 5 containing a lubricant in which the peripheries of therollers are submerged, and the slow movement of the carriage in onedirection, and the quick start of return movement in the otherdirection, produces a slight crawl or slip movement of the rollers, sothat in time the entire face of with the carriage 6, and is tiltablefrom side to side, so that in conjunction with the adjustment of thebed, and the transverse tiltlng, the table top may be adjusted to anydesired level or inclination. This transverse adjustment may be effectedby connecting one side of the carriage to one side of the top by anintervening adjusting screw, as shown at 7. The table top may be madeeither of strips of the width of each channel, or it may be made up ofwider pieces, grooved with several channels and bolted or otherwisesecured together, having longitudinalchannels from end'to end, as shownat 8 in Figs. 7 and 8. These channels are preferably made with roundedbottoms for the easy collection and travel of the precipitates. Theyhave an even depth for approximately one-half of their length; fromwhich point they gradually diminish in depth, terminating with a depthof 1'/8 of an inch. This difference of depth is Well shown in enlargedview Fig. 8 of one of said channels.

The channeled table top forms a plane which ishigher at one side thanthe other, as shown in Fig. 7, and in operation the pulp is fed on atthe forward end of the high side of the table from any suitable sourceof supply, as at 9 Fig. 3, and it flows transversely across the saidtable with the resulting action of precipitation of the containingconcentrates into the channels over which it passes. The channels filledwith pulp have at the forward end of the table sufficient depth togreatly facilitate precipitation of the concentrates which are made totravel in a close body along the rounded bottom of each channel by meansof the peculiar reciprocating movement. In ores of a slimy naturehowever, some of the concentratable values may be carried over theentire series of channels unless pulp is fed very slowly. To obviatethis I affix a projecting shelf 10 to the lower side of the forward endof table, with its surface inclined toward the table in such a way thatprecipitates which may settle upon it will be returned into thelowermost of the longitudinal grooves or channels, as is plainly shownin Fig. 7.

In order to insure the return of all the material, the terminal end ofshelf has a rifiie or length of the stroke of the crank.

raised portion, as shown at 11, which stands in oblique position withrelation to the main portion of the table, and this oblique shoulder orabutment causes the divergence of the precipitates back into thelowermost channel. The motion for reciprocating the table with a quickerstart on the return at one end of the stroke, than the movement at theother end is effected by a driven shaft 15, which has at one end a crankwith a connecting rod or link 16, of a length approximating the The pathof the other end of the connecting rod orlink is defined by a longanchoring link 17, one end of which is connected with the link 16, andthe other end with a fixed point of support about which the link 17oscillates. The thrust bar or rod 18 has one end connected with the pinwhich connects the rod 17 with the end link 16. The movement of thecrank around its center, acting through the link 16, causes the rod 17to oscillate about its fixed point of support 17 This movement actsthrough the connecting rod 18, the opposite end of which is connectedwith the table 8, and it will be obvious that this connection produces apeculiar movement of the table.

Referring to the diagram Fig. 12, the crank, being in a verticalupwardposition the first movement of the crank, as indicated by thearrow, acting through the link 16, and the connecting rod 17 and 18,will move the table longitudinally. The termination of the first eighthof this movement is indicated by the letter a, and during this movementthe amount of movement of the table longitudinally will be indicated bythe space a at the opposite end of the diagram. The

one-eighth movement between the point marked 6 and the point e, which isat the bottom of the travel of the crank will produce a lesser movementof the table as indicated by the lines I). The movement from the point 0to the point (Z being the first one-eighth of the arc in the upwardmovement of the crank from the bottom, causes amovement of the oppositeend of the thrust rod, the distance to which is indicated by the space(1, and the final one-eighth of the return movement of the crank at thetop of the circle from the point e to its vertical position, causes amovement of the thrust rod and the table, the amplitude of which isindicated by the space 0. In order to regulate these movements, and togive the table any re quired amount of motion, I have shown the point ofconnection of the rod 18 with the table, as being slidable in guidesupon the table end as shown at 19, and this movement may be convenientlymade by means of a connecting screw and a hand wheel as at 20.

Thus if the point 19 be moved downwardly until it coincides with thefixed connection 17 there will be no movement of the table, and as thepoint 19 is moved upwardly, and

the anchored end of the link at one end of the stroke, and concaved atthe other end.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1,. In a concentrator, a longitudinally andtransversely adjustable table, with means for producing an abruptlongitudinal movement of the table, means for supplying pulp at thereceiving or forward end of the table, said table having longitudinalchannels forming settling and skimming zones, the first portion of whichchannels have substantially level bottoms, and the bottoms of theremainder gradually rising to the terminals of the channels, and a shelfprojecting from the lower side of the table, said shelf inclining towardthe table and having an elevated rib or riffle.

2. A concentrator having a plane surface with settling and skimmingzones formed of longitudinal grooves or channels, the first portion ofwhich have substantially level bottoms, and the remainder having bottomsgradually inclining upward from the ends of the first portion to theterminals of the channels, means for reciprocating the table, means foradjusting the inclination of the table, means for supplying pulp at theupper forward angle of the table, and a shelf projecting from theopposite side of the table and inclining toward the table, said shelfhaging an elevated rib or riflle at its lower en 3. A. concentratortable inclined transversely and having a head-end arranged obliquely tothe sides, said table having a true plane surface, and longitudinal andtransverse adjusting means, said table having, also, longitudinalgrooves forming settling and skimming zones, the first portion of whichgrooves, have level bottoms, and the remainder having the bottomsinclining upwardly to the termination of the groo es, means forproducing an abrupt longitudinal movement of the table, means forsupplying pulp at the upper and head angle of the table, a shelfprojecting from the opposite side of the forward end, said shelf havingan inclination opposite to that of the table, and elevated ribs orriffles at its terminal end.

4. In a concentrator, a longitudinally and transversely adjustabletable, with means for producing an abrupt longitudinal movement of thetable, said table having longitudinal grooves or channels formed in itssurface, with successive level and upwardly inclined bottoms, a shelfprojecting from the opposite side of the forward end, said shelf havingan inclination opposite to the trans rod having its outer end connectedwith the from the opposite side, said shel toward. the table and havingan elevatedouter end of the table rod, and a revoluble crank with whichthe outer ends of said rods the lower. end, and mechanism whereby avariable abrupt movement of the table is produced in the direction ofits length.

7. In a concentrator, a longitudinal and transversely adjustable table,with means'for producing an abrupt longitudinal movement of the table,said table having longitudinal grooves or channels formed in itssurface, means for supplying pulp at the upper and head angle of thetable, and a shelf rojecting f inclining ridge or rifi le at its lowerend.

8. In a concentrator, a longitudinal and transversely adjustable table,with means for producing an abrupt longitudinal movement of the table,said table having longitudinal grooves or channels formed in itssurface, means for supplying pulp at the upper and head angle of thetable, and an inclined shelf projecting from the opposite side of theforward end, said shelf inclining toward the table and having a rib orriffle.

9. In a concentrator, a longitudinal and transversely adjustable table,with means for producing an abru t longitudinal movement of the table,sai table having longitudinal grooves or channels formed in its surface,means for supplying pulp at the upper and head angle of the table toflow transversely across the grooves, and a shelf rojecting from theopposite side, said she inclining toward the table and having anelevated ridge or riffle at its lower end.

10. In a concentrator, a longitudinal and transversely adjustable table,with means for producing an abrupt longitudinal movement of the table,said table having longitudinal grooves or channels formed in itssurface, means for suppl 'n 111 at the up er and head angle of tlie i lfle to flow trailsversely across the grooves, and an inclined shelfprojecting from the opposite side of the forward end, said shelfinclining toward the table and having a rib or riffle fixed diago nallyacross its lower end.

11. In a concentrator, a longitudinal and transversely adjustable table,with means for producing an abrupt longitudinal movement of the table,said table having longitudinal grooves or channels formed in itssurface, means for su plying pulp at the upper and head angle 0 thetable to flow transversely across the grooves, a shelf projecting fromthe opposite side of the forward end, said shelf having an inclinationopposite to the transverse inclination of "the table, and a raised ribor riffle extending diagonally toward the table.

12. In a concentrator, a longitudinal and transversely adjustable table,with means for producing an abrupt longitudinal movement of the table,said table having longitudinal grooves or channels formed in itssurface, means for supplying ulp at the upper and head angle of the tabe to flow transversely across the grooves, a shelf projecting from theopposite side of the forward end, said shelf having an inclinationopposite to the transverse inclination of the table, and a riffle orobstruction whereby material is returned from the shelf to the lowermostof the channels.

, In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

MARTIN PRIOR BOSS. Witnesses S. H. NOURSE, C. H. HARVEY.

